Project description:The histone methyl transferase EZH2 and SMYD2 are master epigenetic regulators involved in histone methylation and gene transcription repression. Here, we report that SMYD2 and EZH2 may act as a complex in transcriptional regulation and are involved in the progression of breast cancer. ChIP-on-chip assays were performed to find unique promoters co-targeted by EZH2 and SMYD2 in MDA-MB-231 cells.
Project description:Dicer, RNase III endonuclease, is an essential enzyme in miRNA biogenesis that regulates target gene expression, and it has been reported that aberrant expressions of Dicer associate with the clinical outcomes of patients in various cancers. To explore the miRNA differencial expression regulated by Dicer in MDA-MB-231/E1A cells, the microarray profiling analysis was employed to conduct differentially expressed miRNAs in stable MDA-MB-231/vector, MDA-MB-231/E1A, and MDA-MB-231/E1A/shDicer cells.
Project description:Dicer, RNase III endonuclease, is an essential enzyme in miRNA biogenesis that regulates target gene expression, and it has been reported that aberrant expressions of Dicer associate with the clinical outcomes of patients in various cancers. To explore the miRNA differencial expression regulated by Dicer in MDA-MB-231/E1A cells, the microarray profiling analysis was employed to conduct differentially expressed miRNAs in stable MDA-MB-231/vector, MDA-MB-231/E1A, and MDA-MB-231/E1A/shDicer cells. The four groups including vector control, E1A-expressing and Dicer knockdown in E1A-expressing MDA-MB-231 cells were harvested and RNA were isolated. Two independent experiments were performed for each group.
Project description:Identification of genes that are involved in self-seeding by comparing gene expression profiles between parental MDA-MB-231 cells and seeder cells (MDA-231-S1a and S1b) 2 replicates from each sample (parental MDA-MB-231, MDA-MB-231 S1a and MDA-MB-231 S1b) were analyzed
Project description:To identify typical enhancers and super-enhancers in the MDA-MB-231 triple-negative breast cancer cell line, we performed ChIP-seq using DNA isolated from untreated MDA-MB-231 cells using an H3K27ac antibody.
Project description:Cytoplasmic RNA bound to eIF4E was pulled down from MDA-MB-231 cells to determine the influence of radiation on eIF4E mRNA binding 4 samples were analyzed with 3 biological replicates
Project description:Although membrane-anchored PD-L1 has been well-studied for its engagement with PD-1 on T cells to evade anti-tumor immunity, whether PD-L1 regulate oncogenic signaling pathways in tumor cells remains elusive. We found that a portion of PD-L1 could translocate to the nucleus and knockout of PD-L1 changed RNA profiles in MDA-MB-231 cells. To further explore potential role of PD-L1 in regulating gene expression in tumor cells, we performed ChIP-seq in HA tag-inserted (after the signal peptide) PD-L1 re-expressed MBA-MB-231cells (endogenous PD-L1 knockout background). Methods: HA-insert-PD-L1 was re-introduced into MDA-MB-231 PD-L1 knockout cells using lentivirus and then the infected cells were selected with puromycin to make stable subclones. ChIP experiments were performed using HA antibody (Abcam, ab9110). Conclusions: Our study indicates that nuclear PD-L1 has potential roles in regulating gene transcription. More efforts are needed to further dissect the exact working model.
Project description:Identification of genes that are involved in self-seeding by comparing gene expression profiles between parental MDA-MB-231 cells and seeder cells (MDA-231-S1a and S1b)